HSC Automotive (VET) flashcards
HSC Automotive (VET) · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Four-stroke cycle
- A petrol engine cycle of intake, compression, power, and exhaust strokes, requiring two crankshaft revolutions to complete one full cycle.
- Stoichiometric air-fuel ratio
- The chemically ideal mass ratio of air to fuel for complete combustion, approximately 14.7:1 for petrol.
- Torque specification
- The manufacturer's tightening force for a fastener, stated with a dry or lubricated condition that affects the actual clamp load achieved.
- Cold cranking amps
- The current a battery can deliver at minus 18 degrees Celsius for 30 seconds while maintaining a usable voltage for starting.
- Hygroscopic brake fluid
- Glycol-based brake fluid absorbs moisture from the air over time, which lowers its boiling point and can cause brake fade.
- Tyre placard pressure
- The vehicle manufacturer's recommended cold inflation pressure, listed on a label in the door jamb or fuel filler area.
- Diagnostic trouble code
- An alphanumeric code stored by the engine control unit that identifies a fault in a circuit or system, guiding further testing.
- Compression ratio
- The ratio of cylinder volume with the piston at bottom dead centre to the volume at top dead centre.
- Engine coolant function
- Coolant transfers heat from the engine to the radiator and raises the boiling point while lowering the freezing point of the cooling system.
- Oil viscosity grade
- A number such as 5W-30 that indicates oil thickness at low and high temperatures, affecting flow and protection.
- Brake pad wear indicator
- A sensor or metal tab that alerts the driver when friction material has worn to a specified minimum thickness.
- Wheel alignment toe setting
- The angle at which wheels point inward or outward relative to each other, affecting tyre wear and straight-line stability.
- Serpentine drive belt
- A single ribbed belt that drives multiple accessories such as the alternator, water pump, and air conditioning compressor.
- Multimeter use on circuits
- A meter that measures voltage, resistance, and current to test circuits; voltage is measured in parallel with the load.
- Service interval schedule
- The manufacturer's specified distance or time between maintenance tasks such as oil changes, filter replacement, and inspections.
- Exhaust gas recirculation
- A system that routes a small amount of exhaust gas back into the intake to lower combustion temperature and reduce nitrogen oxide emissions.
- Personal protective equipment
- Workplace safety gear such as safety glasses, steel-capped boots, gloves, and hearing protection worn to reduce injury risk.
- Hazard versus risk
- A hazard is a source of potential harm; risk is the likelihood and consequence of that harm occurring.
- Safety data sheet
- A document providing hazard, first-aid, handling, storage, and spill-response information for a hazardous chemical in the workplace.
- Class B fire
- A fire involving flammable liquids such as petrol, oil, or solvents, extinguished with foam, dry chemical, or carbon dioxide.
- Hydrogen gas hazard
- Lead-acid batteries release explosive hydrogen during charging, so charging areas must be ventilated and free of sparks or flames.
- Axle stand use
- A support stand placed under a rated jacking point to hold a raised vehicle securely before working beneath it.
- Waste oil disposal
- Used oil is a controlled waste that must be stored in labelled containers and sent to a licensed recycler, never to drains.
- Manual handling control
- Reducing lifting risk through mechanical aids, team lifting, and keeping loads close to the body rather than relying on technique alone.
- Hierarchy of control
- The order of risk controls from most to least effective: eliminate, substitute, engineer, administrate, then use personal protective equipment.
- Isolation and lockout
- The procedure of disconnecting and locking off energy sources before servicing equipment to prevent unexpected start-up or release of stored energy.
- Workshop ventilation
- Airflow that removes exhaust fumes, solvent vapours, and dust from the work area to protect respiratory health.
- Housekeeping in workshop
- Keeping floors clear, spills cleaned, and tools stored to reduce slips, trips, and fire hazards in the workshop.
- Electrical safety tag
- A tag attached to a de-energised circuit or equipment warning others not to operate or reconnect it during maintenance.
- Eye wash station
- A dedicated station for flushing chemicals or debris from the eyes immediately after an exposure incident.
- Environmental spill kit
- A kit of absorbent materials and containment tools kept on hand to control fuel, oil, or coolant spills before they reach drains.
- Noise exposure standard
- The permitted workplace noise level over a set period, above which hearing protection and controls are required.